/*
 * Copyright 2007 ETH Zurich
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 *
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 */

package org.llrp.ltk.net;

import org.apache.mina.core.session.IoSession;
import org.apache.mina.filter.codec.ProtocolCodecFactory;
import org.apache.mina.filter.codec.ProtocolDecoder;
import org.apache.mina.filter.codec.ProtocolEncoder;

/**
 * Codec Factory for LLRP protocol
 */

public class LLRPProtocolCodecFactory implements ProtocolCodecFactory {

    public static final int BINARY_ENCODING = 1;
    private final ProtocolEncoder encoder;
    private final ProtocolDecoder decoder;


    /**
     * LLRPProtocolCodecFactory supports a single encoder/decoder type only:
     * The binary message binding in the LLRP specification.
     *
     * @param type Codec to be used (currently only LLRPProtocolCodecFactory.BINARY_ENCODING is supported)
     */

    public LLRPProtocolCodecFactory(int type) {
        switch (type) {
            case BINARY_ENCODING:

                encoder = new LLRPBinaryEncoder();
                decoder = new LLRPBinaryDecoder();
                break;
            default:
                throw new IllegalArgumentException(
                        "only BINARY_ENCODING type supported");
        }
    }

    /**
     * get protocol decoder for session specified. There is currently only a LLRPBinaryDecoder supported.
     *
     * @param session
     * @return ProtocolDecoder
     */
    public ProtocolDecoder getDecoder(IoSession session) throws Exception {
        return decoder;
    }

    /**
     * get protocol encoder for session specified. There is currently only a LLRPBinaryEncoder supported.
     *
     * @param session
     * @return ProtocolEncoder
     */
    public ProtocolEncoder getEncoder(IoSession session) throws Exception {
        return encoder;
    }

    /**
     * get protocol decoder. There is currently only a LLRPBinaryDecoder supported.
     *
     * @return ProtocolDecoder
     */
    public ProtocolDecoder getDecoder() throws Exception {
        return decoder;
    }

    /**
     * get protocol encoder. There is currently only a LLRPBinaryEncoder supported.
     *
     * @return ProtocolEncoder
     */
    public ProtocolEncoder getEncoder() throws Exception {
        return encoder;
    }


}
